*{
        margin: 0px;
        padding: 0px;
    }


    .nav{
        width: 100%;
        height: 50px;
        background:#110909;
        opacity: 0.5;
        margin:0px ;
        padding: 10px;
    }
    .nav_content{
        display: inline-block;
        width: 10%;
        height: 50px;
        line-height:50px;
        text-align:center;
    }
    .nav_content a{
			text-decoration: none;
			color: #FFFFFF;
			font-size: 20px;
    }
    .nav_content :hover{
        background:#94898A;

    }
    .left {
        width: 15%;
        height: 100%;
        background: #ffebbd;
        opacity: 0.5;
        margin:0px ;
        padding: 10px;
        float :left;
    }
    .left_content :hover{
        background:#94898A;
    }
    .left_content {
        border: 1px solid black;
        width: 100px;
        height: 20%;
        color: #3C5992;
        opacity: 0.5;
        margin:0px ;
        padding: 10px;
    }
    .right{
        width: 80%;
        height: 80%;
        background: #3C5992;
        opacity: 0.5;
        margin:0px ;
        padding: 10px;
        float :right;
    }
    .right_content {
        border: 1px solid black;
        margin: 30px;
        padding: 40px;
    }
